Question

Решите пожалуйста очень срочно!!!!

Answer 1

решение задания смотри на фото

Answer 2

$1)sqrt{sqrt{20}-2 } *sqrt{sqrt{20}+2 }=sqrt{(sqrt{20}-2)(sqrt{20}+2)}=sqrt{(sqrt{20)^{2}}-2^{2}}=sqrt{20-4}=sqrt{16}=4\\2)(sqrt{11+6sqrt{2} }-sqrt{11-6sqrt{2} })^{2} =(sqrt{11+6sqrt{2} })^{2}-2*sqrt{11+6sqrt{2} }*sqrt{11-6sqrt{2} }+(sqrt{11-6sqrt{2} })^{2}=11+6sqrt{2}-2*sqrt{(11-6sqrt{2})(11+6sqrt{2}}+11-6sqrt{2}=22-2*sqrt{11^{2} -(6sqrt{2})^{2}}=22-2*sqrt{121-72}=22-2*sqrt{49} =22-2*7=8$